A stack system

Abstract

The present invention relates to a stacking system, which includes a stacking track, a stacking vehicle disposed on the stacking track, storage racks disposed on both sides of the stacking track, and a transfer platform disposed on one side of the stacking track and on one side of the storage racks. The storage racks include a plurality of layer racks stacked in sequence from bottom to top. Each layer rack is provided with a plurality of storage channels. At the front end of each storage channel on each layer rack, there is a walking channel. Two first walking tracks are provided on the walking channel. Two storage tracks are provided in each storage channel. A second walking track connecting each storage track is provided between the two first walking tracks on the walking channel. A four-way vehicle for shuttling between the storage track and the second walking track is provided on the walking channel. The four-way vehicle can travel along the first walking track. A crossbeam rack for placing articles is provided above the four-way vehicle on the walking channel. It solves the technical problems of the existing stacking system, such as large floor area and low working efficiency.

Description

Technical Field

[0001] The present invention relates to a stacking system. Background Art

[0002] At present, existing warehousing systems have shown a trend of intelligence and automation. For example, Chinese Patent No.: CN201110028000.9 discloses a warehousing method and equipment for an intensive logistics warehouse. The technical solution adopted is: a warehousing method for intensive logistics, characterized in that: the warehousing method divides goods into different types according to the different shipment volumes of goods of different brands in the warehouse, stores different types of goods in different positions of the logistics warehouse, and adopts different outbound methods for outbound. The beneficial effects of the present invention are as follows: This intensive warehouse overcomes the drawbacks of traditional logistics warehouses in storing goods according to the order of inbound time or the variety of goods, has the functions of storing goods classified by brand and sorting and outbound according to order requirements, effectively realizes the intensive storage of goods, ensures the full utilization of warehouse space, and at the same time has flexible operation sequences, reduces the storage cost of goods, and achieves the purpose of efficient storage and sorting of goods of different brands.

[0003] However, existing stacking systems still have technical problems such as a large floor area and low working efficiency. Summary of the Invention

[0004] Therefore, in view of the above problems, the present invention proposes a stacking system, which solves the technical problems of the existing stacking system such as a large floor area and low working efficiency.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A stacking system includes a stacking track, a stacking vehicle provided on the stacking track, storage racks provided on both sides of the stacking track, and a transfer platform provided on one side of the stacking track and on one side of the storage racks. The storage racks include a plurality of layer racks stacked in sequence from bottom to top. Each layer rack is provided with a plurality of storage channels. At the front end of each storage channel on each layer rack, there is a walking channel. Two first walking tracks are provided on the walking channel. Two storage tracks are provided in each storage channel. A second walking track connecting the storage tracks is provided between the two first walking tracks on the walking channel. A four-way vehicle for shuttling between the storage tracks and the second walking track is provided on the walking channel. The four-way vehicle can travel along the first walking track. A crossbeam rack for placing items is provided above the four-way vehicle on the walking channel.

[0006] Further, the four-way vehicle includes a body, a lifting locking pin that can be lifted up and down on the body, and a lifting driving device arranged on the body for driving the lifting locking pin. The stacker includes a body, a fork arm that can be telescoped along the body, and a telescopic driving device arranged on the body for driving the fork arm. The distance between two adjacent cross beam frames is greater than the width of the four-way vehicle, and a clamping groove corresponding to the lifting locking pin is arranged on the fork arm.

[0007] Further, the shelf includes a cross bar and a vertical bar. Support plates are respectively arranged at the front and rear ends of the vertical bar located in the walking passage. The support plate includes a U-shaped bracket clamped and locked on the vertical bar, a transverse bracket arranged on the side surface of the U-shaped bracket, and a rib plate connecting the transverse bracket and the U-shaped bracket. The cross beam frame is detachably arranged on the rib plate.

[0008] Further, the rib plate and the transverse bracket are respectively fixedly connected to the cross bar.

[0009] Further, a bent reinforcing plate is arranged on the circumferential side of the rib plate where it is not connected to the transverse bracket and the U-shaped bracket.

[0010] Further, the cross beam frame includes a square tube body and a plurality of reinforcing ridges arranged on the inner wall of the square tube body.

[0011] Further, the connection between two adjacent second walking tracks is reinforced by more than two connecting pieces, and at least two connecting pieces are in a cross state.

[0012] Further, the stacker includes a walking bracket that travels on a stack track, a walking driving device arranged on the walking bracket, a lifting bracket arranged on the walking bracket, a lifting seat that can be lifted up and down along the lifting bracket, a lifting driving device for driving the lifting seat to lift, a telescopic fork arm arranged on the lifting seat, and a telescopic fork arm driving device arranged on the lifting seat for driving the telescopic fork arm. The walking bracket includes a main body part, transverse support parts arranged on both sides of the main body part, more than two pairs of walking wheels arranged at the lower ends of the transverse support parts, and guiding support parts arranged on the transverse support parts outside the walking wheels. Each pair of walking wheels respectively abuts against the upper end surface of the stack track. A first sliding rail is arranged on the outer side of the stack track. The guiding support part is slidably clamped with the first sliding rail. A walking gear is arranged on the output shaft of the walking driving device. A walking rack is arranged on the inner side of at least one stack track. The walking gear meshes with the walking rack to achieve transmission. The lifting bracket includes two side frames and a transverse frame connected to the upper ends of the two side frames. The side frame is formed by surrounding at least three vertical columns, and a plurality of transverse columns are connected between two adjacent vertical columns.

[0013] Further, guiding wheel mechanisms are respectively arranged on the lifting seat and clamped on both sides of the side frames. The guiding wheel mechanism includes guiding wheel seats respectively in contact with and abutted against two side surfaces of the column, bearing seats slidable along the guiding wheel seats, and guiding wheels rotatably arranged on the bearing seats. A pressing spring for pressing the bearing seat against the column is arranged on the guiding wheel seat, and more than two guiding wheels are arranged on each guiding wheel seat in an up-and-down distribution.

[0014] Further, lifting racks are arranged on two columns of each side frame, the lifting driving device is a double-shaft motor, and lifting gears are respectively arranged at both ends of the rotating shafts of the double-shaft motor. Each lifting gear is in meshing transmission with each lifting rack.

[0015] By adopting the foregoing technical solutions, the beneficial effects of the present invention are as follows:

[0016] 1. Through the setting of such a stacking system, firstly, the problem that the existing stacking system needs to cycle back and forth can be solved. The biggest drawback of cycling back and forth is that the walking distance is long, resulting in short battery life. The existing four-way vehicles usually can be used for 6 hours with a single charge. That is to say, if they operate at full load, at least four four-way vehicles are required, which not only increases the cost but also affects the battery life of the four-way vehicles. In addition, in extreme use environments, such as cold storage and freezer storage, the battery usage time of the four-way vehicles will be significantly reduced, usually only 3 - 4 hours, which will further reduce the usage efficiency. Secondly, the problem of low efficiency of the existing stacking system can be solved. When the goods are transferred from the stacking channel to the transfer platform, it usually requires a long distance, which wastes both time and electric energy and results in low overall cargo transfer efficiency. Thirdly, the problem of land occupation of the existing stacking system can be solved. In order to achieve high efficiency, the existing stacking systems often adopt structures with a large floor area and a large number of single-layer shelf stacks. Since the four-way vehicles of this system transfer goods between shelves through a fixed-position lifting ladder, the efficiency is low, so there is such a structure. However, this solution does not have these defects. Compared with the existing stacking systems, it can achieve dense storage with a higher floor height. It uses four-way vehicles to transport the goods in the storage channel to the walking channel and place the goods on the walking channel, and then uses the stacking vehicle to take out the goods from the walking channel and send them to the transfer platform. At the same time, the four-way vehicle can go to other storage channels to take out goods again. On the contrary, the process of storing goods is similar. In addition, on the same shelf, multiple four-way vehicles can be arranged, and there will be no blocking problem as in the existing stacking systems. The four-way vehicles on one shelf in this solution can quickly shuttle between each storage channel and the walking channel, and the storage channel becomes the avoidance area.

[0017] 2. Since these four-way vehicles are in a densely stored area, there will also be a maintenance problem because it is difficult for personnel to enter and exit in the dense area, and it is impossible to effectively handle these relatively heavy four-way vehicles. In this solution, a stacker can be used to lift and retrieve the four-way vehicle, so as to achieve the removal and maintenance of the four-way vehicle. However, the stability of this lifting and retrieving is relatively weak. By setting the lifting lock pin and the clamping groove, the stacker can be effectively fixed, so as to achieve effective lifting and transfer.

[0018] 3. Through the structural setting of the support plate, its installation performance and stability performance can be achieved, and the purpose of effectively supporting the cross beam frame can be realized. The rib plate and the transverse bracket are respectively fixedly connected to the cross bar to improve the support performance. The bent reinforcing plate is provided on the peripheral side where the rib plate is not connected to the transverse bracket and the U-shaped bracket, which is also to improve the support performance.

[0019] 4. The cross beam frame includes a square tube body and a plurality of reinforcing ridges provided on the inner wall of the square tube body to improve the performance of the cross beam frame itself in carrying goods.

[0020] 5. The adjacent two second walking tracks are reinforced and connected through more than two connecting pieces, and at least two connecting pieces are in a cross state, so as to effectively improve the support purpose and effectively realize the purpose of the walking passage carrying goods.

[0021] 6. The setting of the stacker can realize that only the lower track is set without the upper overhead track, thus achieving the advantages of convenient installation, cost saving, and not requiring a floor slab. Through the setting of the lifting bracket, higher support performance and support strength can be achieved.

[0022] 7. The setting of the guide wheel mechanism can effectively achieve the purposes of guiding, preventing deviation, and good guiding stability, prevent the problem of unstable lifting of the lifting seat due to the absence of the overhead track, and effectively improve the work efficiency.

[0023] 8. Through the cooperation of the lifting rack and the double-shaft motor, effective driving can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the present invention;

[0025] Figure 2 is Figure 1 the right view of

[0026] Figure 3 is a three-dimensional structural diagram of the storage rack;

[0027] Figure 4 is the front view of the storage rack;

[0028] Figure 5 isFigure 4 Left view;

[0029] Figure 6 is Figure 3 Enlarged view of part A in

[0030] Figure 7 Schematic structural view of the crossbeam frame;

[0031] Figure 8 Schematic three - dimensional structural view of the four - way vehicle;

[0032] Figure 9 Schematic side - view structure of the four - way vehicle;

[0033] Figure 10 Schematic structural view of the fork arms of the four - way vehicle and the stacker;

[0034] Figure 11 Schematic three - dimensional structural view of the cooperation between the stacker and the stacking track;

[0035] Figure 12 Front view of the stacker;

[0036] Figure 13 Enlarged top - view of the stacker;

[0037] Figure 14 Enlarged right - view of the stacker. Detailed implementation mode

[0038] The present invention will be further described below in conjunction with the accompanying drawings and the detailed implementation mode.

[0039] Refer to Figures 1 to 9, this embodiment provides a stacking system, including a stacking track 1, a stacking vehicle 2 disposed on the stacking track 1, storage racks 3 disposed on both sides of the stacking track 1, and a transfer platform 4 disposed on one side of the stacking track 1 and on one side of the storage rack. The storage rack 3 includes a plurality of shelf layers 31 stacked in sequence from bottom to top. Each shelf layer 31 is provided with a plurality of storage channels 32. At the front end of each storage channel 32 on each shelf layer 31, there is a walking channel 33. Two first walking tracks 331 are provided on the walking channel 33. Two storage tracks 321 are provided in each storage channel 32. A second walking track 332 connecting the storage tracks is provided between the two first walking tracks 331 on the walking channel 33. A four-way vehicle 5 for shuttling between the storage track 321 and the second walking track 332 is provided on the walking channel 33. The four-way vehicle 5 can travel along the first walking track 331. Above the four-way vehicle 5 on the walking channel 33, there is a crossbeam rack 333 for placing items. The shelf layer 31 includes a crossbar 311 and a vertical bar 312. Support plates 34 are respectively provided at the front and rear ends of the walking channel 33 on the vertical bar 312. The support plate 34 includes a U-shaped bracket 341 clamped and locked on the vertical bar 312, a transverse bracket 342 provided on the side of the U-shaped bracket 341, and a rib plate 343 connecting the transverse bracket 342 and the U-shaped bracket 341. The crossbeam rack 333 is detachably provided on the rib plate 343. The rib plate 343 and the transverse bracket 342 are respectively fixedly connected to the crossbar 311 through fixing members 344. Bent reinforcing plates 3431 are provided on the peripheral side of the rib plate 343 that is not connected to the transverse bracket 342 and the U-shaped bracket 341. The crossbeam rack 333 includes a square tube body 3331 and a plurality of reinforcing ridges 3332 provided on the inner wall of the square tube body 3331. The adjacent two second walking tracks 332 are reinforced and connected through more than two connecting members 334. At least two connecting members 334 are in a cross state. In this solution, the connecting members 334 between the adjacent two second walking tracks 332 are two, both of which are pipe materials, such as square pipes or round pipes, and their materials can be aluminum profiles or steel materials.

[0040] The four-way vehicle 5 includes a body 51, a lifting lock pin 52 that can be lifted up and down on the body 51, and a lifting drive device 53 disposed on the body 51 for driving the lifting lock pin 52. The lifting drive device 53 is an electric push rod, and this telescopic structure is well known and will not be elaborated here.

[0041] The stacking vehicle 2 includes a body, a fork arm 2a that can be telescoped along the body, and a telescopic drive device disposed on the body for driving the fork arm. The distance between adjacent two crossbeam racks is greater than the width of the four-way vehicle 5. A clamping groove 2b corresponding to the lifting lock pin is provided on the fork arm 2a. The clamping groove 2b can be a through groove.

[0042] The above-mentioned four-way vehicle and stacker are existing devices. The four-way vehicle is equipped with a lifting drive device and a lifting locking pin, and a clamping groove is provided on the fork arm of the stacker. The above-mentioned storage rack is an existing device, but a walking passage and other components are added to its front end to realize the walking of the four-way vehicle and the placement of goods. The above structure is only a preferred embodiment, and the material of the storage rack can be iron or aluminum. The above-mentioned support plate can also be other structures, such as channel steel and other structures. The above cross beam frame can be other structures, such as round pipes, channel steel, etc.

[0043] The four-way vehicle of the above stack system can move in the storage passage to realize the storage or retrieval of goods. It can also move into the walking passage to realize the mutual transfer of goods on the walking passage and the storage passage. In addition, the four-way vehicle can travel along the walking passage to realize the switching and use in different storage passages. In this way, one or more four-way vehicles can be set on the same shelf according to needs, so as to meet the handling requirements of goods. Since the handling distance is short, the handling efficiency can be greatly improved. In addition, in cooperation with the stacker, the stacker can transfer the goods from the walking passage to the transfer platform, so as to realize the purpose of moving the goods in or out. There are several advantages. First, the stacker itself relies on a wired power supply, while the four-way vehicle relies on a battery. The two are used in combination, which can greatly increase the use time of the four-way vehicle and keep it running efficiently. Second, it can realize the longitudinal development of the stacking space and achieve dense stacking. Third, a four-way vehicle is set on each floor, which can achieve extremely high efficiency. Moreover, the four-way vehicle can achieve extremely high efficiency without using a lifting mechanism for lifting. In addition, when such high-efficiency operation is not required, fewer four-way vehicles can be set, and the stacker can be used to realize the transfer of the four-way vehicle between the upper and lower shelves. Fourth, even if there are multiple four-way vehicles on the same floor, they are not easily blocked from each other and can effectively avoid each other. Fifth, two stackers can be set on both sides of the stack track respectively to realize double-station operation.

[0044] By adopting the foregoing technical solutions, the beneficial effects of the present invention are:

[0045] 1. By setting up such a stack system, firstly, the problem of the need for cyclic round trips in the existing stack system can be changed. The biggest drawback of cyclic round trips is the long walking distance, which leads to short battery life. Currently, four-way vehicles can usually be used for 6 hours with a single charge. That is to say, if operating at full load, at least four four-way vehicles are required, which not only increases costs but also affects the battery life of the four-way vehicles. Secondly, the inefficiency of the existing stack system can be changed. When goods are transferred from the stack channel to the transfer channel, it often requires a relatively long distance, which wastes both time and electrical energy and results in a low overall cargo transfer efficiency. Thirdly, the land occupation problem of the existing stack system can be changed. In order to achieve high efficiency, the existing stack system often adopts a structure with a large land occupation area and a large number of single-layer shelf stacks. Since the four-way vehicle in this system realizes the transfer of goods between shelves through a lift at a fixed position, the efficiency is low, so this structure is adopted. However, this solution does not have these defects. It can achieve dense and high-rise storage. It uses four-way vehicles to carry the goods in the storage channel to the walking channel, place the goods on the walking channel, and then use the stack vehicle to take the goods out of the walking channel and send them to the transfer platform. At the same time, the four-way vehicle can go to other storage channels to take out goods again. Conversely, the process of storing goods is similar. In addition, multiple four-way vehicles can be set on the same shelf. There is no such problem of obstruction as in the existing stack system. The four-way vehicles on one shelf in this solution can quickly shuttle between each storage channel and the walking channel, and the storage channel becomes the area for avoidance.

[0046] 2. Since these four-way vehicles are in a dense storage area, there will also be a maintenance problem. Because it is very difficult for personnel to enter and exit in a dense area, and it is also impossible to effectively handle these relatively heavy four-way vehicles. In this solution, the stack vehicle can be used to fork and pick up the four-way vehicle, so as to realize the removal and maintenance of the four-way vehicle. However, the stability of this kind of fork and pick up is relatively weak. By setting up lifting lock pins and clamping grooves, the stack vehicle can be effectively fixed, so as to realize effective fork and pick up and transfer.

[0047] 3. Through the structural setting of the support plate, its installation performance and stability performance can be realized, and the purpose of effectively supporting the cross beam frame can be achieved. The rib plate and the transverse support are respectively fixedly connected to the cross bar to improve the support performance. The bent reinforcing plate is provided on the circumferential side where the rib plate is not connected to the transverse support and the U-shaped support, which is also to improve the support performance.

[0048] 4. The cross beam frame includes a square tube body and a plurality of reinforcing ridges provided on the inner wall of the square tube body to improve the performance of the cross beam frame itself in carrying goods.

[0049] 5. The adjacent second walking tracks are reinforced and connected by more than two connecting pieces, and at least two connecting pieces are in a cross state, which can effectively improve the support purpose and effectively achieve the purpose of the walking passage for carrying goods.

[0050] Based on the above solution, the stacker is correspondingly improved. The stacker 2 includes a walking bracket that moves on the stack track 1, a walking drive device 281 provided on the walking bracket, a lifting bracket provided on the walking bracket, a lifting seat 23 that can move up and down along the lifting bracket, a lifting drive device 282 for driving the lifting of the lifting seat 23, a telescopic fork arm 24 provided on the lifting seat 23, and a telescopic fork arm drive device 283 provided on the lifting seat 23 for driving the telescopic fork arm. The walking bracket includes a main body part 211, lateral support parts 212 provided on both sides of the main body part 211, more than two pairs of walking wheels 213 provided at the lower ends of the lateral support parts 212, and guide support parts 214 provided on the lateral support parts 212 outside the walking wheels 213. Each pair of walking wheels 213 respectively abuts against the upper end surface of the stack track 1. A first slide rail 11 is provided on the outside of the stack track 1. The guide support part 214 is slidably engaged with the first slide rail 11. A walking gear 25 is provided on the output shaft of the walking drive device. A walking rack 12 is provided on the inner side of at least one stack track 1. The walking gear 25 is engaged with the walking rack 12 to achieve transmission. The lifting bracket includes two side frames 221 and a transverse frame 222 connected to the upper ends of the two side frames 221. The side frame 221 is formed by enclosing three columns 2211. A plurality of transverse columns 2212 are connected between adjacent two columns 2211. In this embodiment, the number of columns can be set according to actual needs. The three columns form a triangular support, which is a better stable support.

[0051] Guide wheel mechanisms 26 are respectively provided on the lifting seat 23 and clamped on both sides of the two side frames 221. The guide wheel mechanism 26 includes a guide wheel seat 261 that respectively contacts and abuts against two side surfaces of the column 2211, a bearing seat 262 that can slide along the guide wheel seat 261, and a guide wheel 263 rotatably provided on the bearing seat. A pressing spring 264 for pressing the bearing seat 262 against the column 2211 is provided on the guide wheel seat 261. This structure is the application of conventional technical means and will not be elaborated here. Two guide wheels 263 are provided on each guide wheel seat 261 in the up and down distribution. The number of guide wheels can be set according to actual needs. Moreover, multiple guide wheel mechanisms 26 can be provided. When the column has multiple adjacent planes, at least two adjacent planes are provided with guide wheel mechanisms 26. Lifting racks 27 are provided on two of the columns of each side frame 221. The lifting drive device is a double-shaft motor. Lifting gears are respectively provided at both ends of the rotating shafts of the double-shaft motor. Each lifting gear is engaged with each lifting rack for transmission.

[0052] The arrangement of the stacker allows for the installation of only the lower tracks without the need for the upper overhead tracks, thus achieving the advantages of convenient installation, cost savings, and not requiring a floor slab. Through the arrangement of the lifting brackets, high support performance and strength can be achieved. The arrangement of the guide wheel mechanism can effectively achieve the purposes of guiding, preventing deviation, and having good guiding stability, preventing the problem of unstable lifting of the lifting seat due to the absence of overhead tracks and effectively improving work efficiency. Through the cooperation of the lifting rack and the dual-axis motor, effective driving can be achieved.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0054] In the present invention, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0056] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0057] Although the present invention has been specifically shown and described in connection with the preferred embodiments, those skilled in the art should understand that various changes in form and detail can be made to the present invention without departing from the spirit and scope of the present invention as defined by the appended claims, and all such changes are within the protection scope of the present invention.

Claims

1. A stack system, characterized in that: it includes a stack track, a stack vehicle arranged on the stack track, storage racks arranged on both sides of the stack track, and a transfer platform arranged on one side of the stack track and on one side of the storage racks. The storage racks include a plurality of layer racks stacked in sequence from bottom to top. Each layer rack is provided with a plurality of storage channels. At the front end of each storage channel on each layer rack, there is a walking channel. Two first walking tracks are arranged on the walking channel. Two storage tracks are arranged in each storage channel. A second walking track connecting each storage track is arranged between the two first walking tracks on the walking channel. A four-way vehicle for shuttling between the storage track and the second walking track is arranged on the walking channel. The four-way vehicle can travel along the first walking track. A crossbeam rack for placing articles is arranged above the four-way vehicle on the walking channel; the four-way vehicle includes a body, a lifting locking pin arranged on the body that can be lifted and lowered, and a lifting driving device arranged on the body for driving the lifting locking pin. The stack vehicle includes a body, a fork arm that can extend and retract along the body, and a telescopic driving device arranged on the body for driving the fork arm. The distance between two adjacent crossbeam racks is greater than the width of the four-way vehicle. A clamping groove corresponding to the lifting locking pin is arranged on the fork arm; the layer rack includes a cross bar and a vertical bar. Support plates are respectively arranged at the front and rear ends of the walking channel on the vertical bar. The support plate includes a U-shaped bracket clamped and locked on the vertical bar, a horizontal bracket arranged on the side of the U-shaped bracket, and a rib plate connecting the horizontal bracket and the U-shaped bracket. The crossbeam rack is detachably arranged on the rib plate; the stack vehicle includes a walking bracket for walking on the stack track, a walking driving device arranged on the walking bracket, a lifting bracket arranged on the walking bracket, a lifting seat that can be lifted and lowered along the lifting bracket, a lifting driving device for driving the lifting seat to lift and lower, a telescopic fork arm arranged on the lifting seat, and a telescopic fork arm driving device arranged on the lifting seat for driving the telescopic fork arm. The walking bracket includes a main body part, horizontal support parts arranged on both sides of the main body part, more than two pairs of walking wheels arranged at the lower ends of the horizontal support parts, and guiding support parts arranged on the horizontal support parts outside the walking wheels. Each pair of walking wheels respectively abuts against the upper end surface of the stack track. A first sliding rail is arranged on the outer side of the stack track. The guiding support part is slidably clamped with the first sliding rail. A walking gear is arranged on the output shaft of the walking driving device. A walking rack is arranged on the inner side of at least one stack track. The walking gear meshes with the walking rack to achieve transmission. The lifting bracket includes two side frames and a horizontal frame connecting the upper ends of the two side frames. The side frame is formed by surrounding at least three vertical columns. A plurality of horizontal columns are connected between two adjacent vertical columns; guide wheel mechanisms respectively clamping on both sides of the two side frames are arranged on the lifting seat. The guide wheel mechanism includes a guide wheel seat respectively contacting and abutting against two side surfaces of the vertical column, a bearing seat that can slide along the guide wheel seat, and a guide wheel rotatably arranged on the bearing seat. A pressing spring for pressing the bearing seat against the vertical column is arranged on the guide wheel seat. More than two guide wheels are arranged on each guide wheel seat in the up and down distribution.

2. A stack system according to claim 1, characterized in that: the rib plate and the transverse bracket are respectively fixedly connected to the cross bar.

3. A stack system according to claim 1, characterized in that: a bending reinforcement plate is provided on the circumferential side where the rib plate is not connected to the transverse bracket and the U-shaped bracket.

4. A stack system according to claim 1, characterized in that: the cross beam frame includes a square tube body and a plurality of reinforcing ribs provided on the inner wall of the square tube body.

5. A stack system according to claim 1, characterized in that: the adjacent two second walking tracks are reinforced and connected by more than two connectors, and at least two connectors are in a cross state.

6. A stack system according to claim 1, characterized in that: lifting racks are provided on two of the columns of each side frame, the lifting drive device is a double-shaft motor, lifting gears are respectively provided at both ends of the rotating shafts of the double-shaft motor, and each lifting gear is meshed and driven with each lifting rack.

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